Are there any grants for single moms trying to get there high school diploma?

I'm not entirely sure on this, because while there USED to be scholarships and grants to obtain one's GED, the way that the market is currently, and everyone jumping on the "back to school" wagon, it may be very difficult. I suggest you look up some programs, and ask the school if they offer financial aid.

I will assume you are extremely low income to need help, so have you asked your social services case worker about local programs ?